The calcination of gypsum powder can be divided into desulfurized gypsum, phosphogypsum, etc. according to the raw materials, there are several corresponding calcination processes for different raw materials, some of which are only suitable for natural gypsum, and some of which are only suitable for chemical gypsum.

天然石膏的煅烧有的工艺是先烧后磨，如回转窑煅烧，可以先煅烧颗粒，然后再磨；有的工艺是先磨后烧，如连续炒锅、锥型炒锅、连续回转窑、间歇回转窑、沸腾炉等，国内都在大量的应用；还有就是磨烧一体机，如皮特磨，随研磨随煅烧。

Some calcination processes of natural gypsum are burning first and then grinding, such as calcining in rotary kiln, calcining particles first and then grinding; Some processes, such as continuous frying pan, conical frying pan, continuous rotary kiln, intermittent rotary kiln and fluidized bed furnace, are widely used in China; There is also a grinding and burning machine, such as Pitt mill, with grinding with calcination.

化学石膏的煅烧工艺和天然石膏有些区别，主要是因为化学石膏大部分都含游离水，有些煅烧工艺可以烘干煅烧一体完成，有些工艺烘干和煅烧是分开的，也就是所谓一步法和两步法。

There are some differences between the calcination process of chemical gypsum and natural gypsum, mainly because most of chemical gypsum contains free water. Some calcination processes can be completed by drying and calcination, while some processes are separated, that is, one-step and two-step.

石膏粉的煅烧按煅烧温度区分可以分为低温慢速煅烧和高温快速煅烧，随着科技进步的发展和其他行业的引入，国内涌现出很多类型的设备，低温煅烧设备老一些的如连续炒锅、锥型炒锅、沸腾炉，新上市的如FC煅烧炉；高温快速煅烧国内是北京一热从国外引进的锤式煅烧机，国内后期出现的司德炉，新式的锤式煅烧机。国内外还有很多介于高温和低温之间的一些设备。

According to the calcination temperature, the calcination of gypsum powder can be divided into low-temperature slow calcination and high-temperature fast calcination. With the development of science and technology and the introduction of other industries, many types of equipment have emerged in China. The old low-temperature calcination equipment, such as continuous frying pan, cone-shaped frying pan and fluidized bed furnace, and the new listed equipment, such as FC calciner; High temperature rapid calcination is a hammer type calciner imported from abroad by Beijing first heat Group Co., Ltd. in China, a new type of hammer type calciner appeared in the later stage of China. There are many equipments between high temperature and low temperature at home and abroad.